Dear Mr. Kids,
Previously, I cut dado slots in the Magnaframe for the Mariahs and all was well. I tried to do the same with the glass AF and proceeded to break carbide router bits right and left so I had to cut slots all the way through. I provided an updated instruction sheet about the change and Mylar, recommending the builder wrap the Mylar around a 38mm motor case of the appropriate length. That is then inserted inside the slotted end of the airframe providing a "floor", preventing the builder from over-inserting the fins during attachment.
Thank you,
Kent/GLR